_Could I go to the movie this Sunday, Dad?

_ Yes, you_____. But you ______ come back before nine.

_Could I go to the movie this Sunday, Dad?

Yes, you_____. But you ______ come back before nine.

A．should, can                            B．must ,have to

C．can , have to                           D．need, must

　　阅读理解

　　No air means death. Although we can not see it, there is air around us. So air is everywhere and it gives life to every living thing. Without air we cannot live. Bad air makes people ill. We must have fresh air to keep us in good health. In the city, there are a great many people, and there are too many cars running on the roads. The gas which the cars spread out is full of poison (毒). Every day we breathe (呼吸) it again and again. This makes us feel sick. Therefore people should go out of doors as much as they can. Besides so many cars, there are many factories, too. From the chimneys (烟囱) of these factories, we usually get the smoke in black or grey colour. This kind of smoke, when it mixes the air, is dangerous to our health. It is because smoke contains many small poisonous (有毒的) solids and gases. So in order to keep us healthy, we have to go out to the countryside to breathe more fresh air, or we can go up hills to get more fresh air.

A．True or False?

1．We can see air everywhere because it gives life to every living thing.

2．The gas full of poison makes us feel sick.

3．The smoke in black or grey color is very harmful to our health.

4．If we go out to the countryside, we can get more fresh air.

5．We climb hills in order to keep us healthy.

B．Fill in the blanks.

6．Every living thing can't live ________ air.

7．A ________ ________ people and too many cars ________ on the roads.

8．We must have ________ ________ to keep us ________.

从所给的四个选项中选择最佳答案

—________ I go home now?

—No, you ________ stay here and wait for the teacher.

[　　]

A．Can; may　　　　　 　B．May; must

C．Must; have to　　　　　D．Need; must